如何在Flutter中播放自定义声音？

Question

我能够在这行代码中播放一个简单的声音:

SystemSound.play(SystemSoundType.click);

如何播放自定义声音？

让我们说一个简短的mp3

Answer 1

播放已在资产中定义的文件的简单解决方案是使用AudioCache.图书馆:https://pub.dartlang.org/packages/audioplayers. 有关AudioCache的更多信息 添加库后pubspec.yaml,导入所需的类:

import 'package:audioplayers/audio_cache.dart';

在同一文件中添加资源并将带声音的文件放到assets文件夹中(如果没有此文件夹,则创建它)

assets:
- assets/sound_alarm.mp3

然后添加此代码:

static AudioCache player = new AudioCache();
const alarmAudioPath = "sound_alarm.mp3";
player.play(alarmAudioPath);

这里有一个例子

Answer 2

感谢您查看Flutter!

Flutter SDK今天(截至2017年5月5日)没有内置支持来播放和控制任意音频.但是,我们设计了我们的插件系统来支持它.

此插件为Flutter添加了音频支持:https://pub.dartlang.org/packages/audioplayer

从插件的自述文件:

Future play() async {
  final result = await audioPlayer.play(kUrl);
  if (result == 1) setState(() => playerState = PlayerState.playing);
}

// add a isLocal parameter to play a local file
Future playLocal() async {
  final result = await audioPlayer.play(kUrl);
  if (result == 1) setState(() => playerState = PlayerState.playing);
}


Future pause() async {
  final result = await audioPlayer.pause();
  if (result == 1) setState(() => playerState = PlayerState.paused);
}

Future stop() async {
  final result = await audioPlayer.stop();
  if (result == 1) {
    setState(() {
      playerState = PlayerState.stopped;
      position = new Duration();
    });
  }
}

Answer 3

音频播放器有效（来自https://medium.com/@bennett4/adding-custom-sound-effects-to-a-flutter-mobile-app-41594f1f3305）：

(1) 将库添加到 pubspec.yaml 中：audioplayers: ^0.15.1

(2) 在 pubspec.yaml 下flutter添加对资产文件的引用：

flutter
    assets:
       - assets/yes.mp3

确保它位于资产文件夹下。当它位于子文件夹中时它不起作用。例如，类似： - asset/sounds/yes.mp3 将不起作用。只需将音频文件放入 asset 文件夹中，而不是其子文件夹中

(3) 将库导入到您的应用程序中：import package:audioplayers/audioplayers.dart;

(4)然后定义这个函数：

Future<AudioPlayer> playLocalAsset() async {
    AudioCache cache = new AudioCache();
   //At the next line, DO NOT pass the entire reference such as assets/yes.mp3. This will not work.
   //Just pass the file name only.
    return await cache.play("yes.mp3"); 
}

(5) 每当需要播放声音时调用该函数：await playLocalAsset();

Answer 4

空安全代码：

1. 将依赖项添加到您的pubspec.yaml文件中，

   dependencies:
     audioplayers: ^0.19.0
   

2. 将音频文件路径添加到您的pubspec.yaml文件中。

   flutter: 
     assets:
       - assets/audio/my_audio.mp3
   

3. 跑步flutter pub get

完整代码：

dependencies:
  audioplayers: ^0.19.0